Oil recovery with methylolated polyacrylamide thickener
Patent
·
OSTI ID:6812472
High molecular weight unhydrolyzed polyacrylamide in aqueous solution is contacted with formaldehyde which reacts to cause methylolation. It has been discovered that this reaction improves the viscosity, the screen factor, and the efficiency in recovery of oil in supplemented petroleum recovery processes, including primary, secondary or tertiary processes for the recovery of petroleum in which displacement fluids are injected into the formation to drive petroleum in place toward a production well. In addition, the compositions and processes of the present invention can be utilized for the formulation of controlled density fluids, e.g., for ore flotation, liquid-solid separation processes. (8 claims)
- Assignee:
- EDB-83-001317
- Patent Number(s):
- US 3747676
- OSTI ID:
- 6812472
- Country of Publication:
- United States
- Language:
- English
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